Teams are allowed to carry over their salary cap space from last year, and the average carry-over from last year was $6.1 million per team. So, NFL teams will have an average of $139.1 million to spend on player salaries.

Teams are required to spend an average of 89 percent of the salary cap in cash from 2013 to 2016. NFL teams league-wide are required to spend an average of 95 percent of the salary cap during that span.

"This creates a cash-spend floor, forcing historically low-spending clubs to offer overall competitive compensation for packages," the union said in a statement.

Teams are required to spend over $33 million in benefits, including pension, severance, workers compensation, insurance premiums and disability benefits.

The Ravens were roughly $27 million under the limit prior to tight end Dennis Pitta's five-year, $32 million contract. His first-year cap figure wasn't expected to be inordinately high.